package com.example.cangzhou.interceptor;


import com.example.cangzhou.context.BaseContext;
import com.example.cangzhou.properties.JwtProperties;
import com.example.cangzhou.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        String uri=request.getRequestURI();
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)||uri.contains("/login")) {
            //当前拦截到的不是动态方法,或者拦截到了登录方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader("token");
        if (token == null) token = request.getHeader("Authorization");

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            token = token.substring(token.indexOf("*") + 1);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getSecretKey(), token);
            Long userId = Long.valueOf(claims.get("userId").toString());
            log.info("当前用户id：{}", userId);
            BaseContext.setCurrentId(userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
